Evidence map›Paper›PMID 32584826›Full record

ArticlePloS one2020

Regional differences in hamstring muscle damage after a marathon.

Ayako Higashihara, Kento Nakagawa, Takayuki Inami, Mako Fukano, Satoshi Iizuka, Toshihiro Maemichi, Satoru Hashizume, Takaya Narita, Norikazu Hirose

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.2field-weighted citation impact, top 24% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed, 18 citations in OpenAlex.

  1. Review
  2. Review
  3. Article
  4. Lower Extremity Musculoskeletal Injuries Associated with Marathon Running.Current reviews in musculoskeletal medicine · 2025
    Review
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  6. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 5 institutions in 1 country.

Ayako HigashiharaInstitute of Physical Education, Keio University, Kanagawa, Japan.ORCID 0000-0002-8634-0959
Kento NakagawaFaculty of Sport Sciences, Waseda University, Saitama, Japan.
Takayuki InamiInstitute of Physical Education, Keio University, Kanagawa, Japan.
Mako FukanoShibaura Institute of Technology, Tokyo, Japan.
Satoshi IizukaFaculty of Sport Sciences, Waseda University, Saitama, Japan.ORCID 0000-0002-0480-3754
Toshihiro MaemichiFaculty of Sport Sciences, Waseda University, Saitama, Japan.
Satoru HashizumeNational Institute of Advanced Industrial Science and Technology, Tokyo, Japan.
Takaya NaritaDepartment of Sport Technology, Toin University of Yokohama, Kanagawa, Japan.
Norikazu HiroseFaculty of Sport Sciences, Waseda University, Saitama, Japan.
Waseda University · JPKeio University · JPNational Institute of Advanced Industrial Science and Technology · JPShibaura Institute of Technology · JPToin University of Yokohama · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Previous studies suggest that marathon running induces lower extremity muscle damage. This study aimed to examine inter- and intramuscular differences in hamstring muscle damage after a marathon using transverse relaxation time (T2)-weighted magnetic resonance images (MRI). 20 healthy collegiate marathon runners (15 males) were recruited for this study. T2-MRI was performed before (PRE) and at 1 (D1), 3 (D3), and 8 days (D8) after marathon, and the T2 values of each hamstring muscle at the distal, middle, and proximal sites were calculated. Results indicated that no significant intermuscular differences in T2 changes were observed and that, regardless of muscle, the T2 values of the distal and middle sites increased significantly at D1 and D3 and recovered at D8, although those values of the proximal site remained constant. T2 significantly increased at distal and middle sites of the biceps femoris long head on D1 (p = 0.030 and p = 0.004, respectively) and D3 (p = 0.007 and p = 0.041, respectively), distal biceps femoris short head on D1 (p = 0.036), distal semitendinosus on D1 (p = 0.047) and D3 (p = 0.010), middle semitendinosus on D1 (p = 0.005), and distal and middle sites of the semimembranosus on D1 (p = 0.008 and p = 0.040, respectively) and D3 (p = 0.002 and p = 0.018, respectively). These results suggest that the distal and middle sites of the hamstring muscles are more susceptible to damage induced by running a full marathon. Conditioning that focuses on the distal and middle sites of the hamstring muscles may be more useful in improving recovery strategies after prolonged running.

Indexed as

Athletic InjuriesAthletic PerformanceFemaleHamstring MusclesHumansIsometric ContractionJapanMagnetic Resonance ImagingMaleRunningTime FactorsTorqueYoung Adult

Identifiers

PMID32584826
PMCPMC7316338
OpenAlexW3037518098

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.